package com.rd.student.jiaji.class4.suyan.zrrd.day091;

public class RetuenThis {
    public int age=10;
    public RetuenThis grow(){
        age++;
        return this;
    }

    public static void main(String[] args) {
        RetuenThis r=new RetuenThis();
        r.grow().grow().grow();
        System.out.println(r.age);
    }
}
